[PresentationAPI] Implementing send() from WebPresentationClient to the PresentationService.

content/common/presentation/presentation_service.mojom

Index: content/common/presentation/presentation_service.mojom
diff --git a/content/common/presentation/presentation_service.mojom b/content/common/presentation/presentation_service.mojom
index 91da501913f3637a7f6912d88b5151b2f72489eb..da817ddfc837fac6e1ff9740dfb0440a2559b280 100644
--- a/content/common/presentation/presentation_service.mojom
+++ b/content/common/presentation/presentation_service.mojom
@@ -26,6 +26,19 @@ struct PresentationError {
     string message;
 };
 
+enum PresentationMessageType {
+    TEXT,
+    ARRAY_BUFFER,
+};
+
+struct SessionMessage {
+    string presentation_url;
+    string presentation_id;
+    PresentationMessageType type;
+    string? message;
+    array<uint8>? data;
+};
+
 interface PresentationService {
     // Called when the frame sets or changes the default presentation URL or
     // presentation ID.
@@ -74,6 +87,10 @@ interface PresentationService {
     JoinSession(string presentation_url, string? presentation_id)
         => (PresentationSessionInfo? sessionInfo, PresentationError? error);
 
+    // Called when send() is called by the frame. The result callback is
+    // to get notified that message has been received and ready for next one.

[whywhat, 2015/04/30 15:50:58]

nits:
s/message/the message
s/and/and the service is/
I think you need to specify what does the value of the |success| mean too.

[USE s.singapati at gmail.com, 2015/05/04 16:40:28]

Done.

+    SendMessage(SessionMessage message_request) => (bool success);
+
     // Called when closeSession() is called by the frame.
     CloseSession(string presentation_url, string presentation_id);